CN110500129A - A kind of gas drainage tailrace and its application method - Google Patents

A kind of gas drainage tailrace and its application method Download PDF

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Publication number
CN110500129A
CN110500129A CN201910850780.1A CN201910850780A CN110500129A CN 110500129 A CN110500129 A CN 110500129A CN 201910850780 A CN201910850780 A CN 201910850780A CN 110500129 A CN110500129 A CN 110500129A
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CN
China
Prior art keywords
gas drainage
water tank
tailrace
shaped conduit
aqueous
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Granted
Application number
CN201910850780.1A
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Chinese (zh)
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CN110500129B (en
Inventor
陈鹏
刘永杰
陈学习
谢宏
杨涛
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North China Institute of Science and Technology
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North China Institute of Science and Technology
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Priority to CN201910850780.1A priority Critical patent/CN110500129B/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00Drainage
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Sewage (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention provides a kind of gas drainage regenerating unit, including gas drainage pipe, funnel tee tube, flange terminal pad, U-shaped conduit, airtight stopper, device for fixing screen on headrest structure, anti-skidding blind hole, aqueous storage device, valve, mounting plate, left-side switch, right-side switch and adjustable auxiliary stand structure, the funnel tee tube are mounted on the inside middle position of gas drainage pipe by flange terminal pad bolt;The U-shaped conduit is welded on the lower part of funnel tee tube;The airtight stopper is plugged on the upper right of U-shaped conduit;The device for fixing screen on headrest structure is socketed in the outer upper of U-shaped conduit.Clips of the present invention are socketed in the outside of U-shaped conduit, are conducive to when in use tighten bolt and nut on fixed side panel, so that convenient install water tank;Longitudinal baffle is longitudinally embedded in the bosom position of water tank, is conducive to that the aqueous to the left and right sides in water tank is facilitated to play compartmentation when in use.

Description

A kind of gas drainage tailrace and its application method
Technical field
The invention belongs to gas drainage technical field more particularly to a kind of gas drainage tailrace and its application methods.
Background technique
Since the pressure in methane gas extraction pipeline is in negative pressure state, the moisture in coal seam can be extracted into pumping in mash gas extraction It adopts and forms ponding in pipeline, to reduce the accommodating space of gas in extraction pipeline, therefore, it is necessary to periodically discharge extraction pipeline In ponding.
But there is inconveniences that installation is fixed to water tank for existing technology, does not have and carries out to aqueous in water tank Separate and does not have the problem of playing the role of Auxiliary support to water tank bottom.
Therefore, it invents a kind of gas drainage tailrace and its application method is very necessary.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of gas drainage tailrace and its application methods, to solve There is inconveniences that installation is fixed to water tank for existing technology, does not have and is separated to aqueous in water tank and does not have pair Water tank bottom plays the role of the problem of Auxiliary support, a kind of gas drainage regenerating unit, including gas drainage pipe, funnel threeway Pipe, flange terminal pad, U-shaped conduit, airtight stopper, device for fixing screen on headrest structure, anti-skidding blind hole, aqueous storage device, valve, installation Plate, left-side switch, right-side switch and adjustable auxiliary stand structure, the funnel tee tube are pacified by flange terminal pad bolt Mounted in the inside middle position of gas drainage pipe;The U-shaped conduit is welded on the lower part of funnel tee tube;The airtight stopper It is plugged on the upper right of U-shaped conduit;The device for fixing screen on headrest structure is socketed in the outer upper of U-shaped conduit;Described is anti- Sliding blind hole is provided with the front left of U-shaped conduit;The outer lower portion of U-shaped conduit is arranged in the aqueous storage device, and pacifies Mounted in the lower part of device for fixing screen on headrest structure;The valve is threaded in the left upper portion of U-shaped conduit;The left-side switch Screw is mounted on the left side of mounting plate respectively with right-side switch;The adjustable auxiliary stand structure is mounted on aqueous storage dress The lower part set;The aqueous storage device includes water tank, longitudinal baffle, U-shaped aqueduct, left side water pump and right side water pump, The U-shaped aqueduct is plugged on the lower front of water tank;The left side water pump and right side water pump screw is mounted on water storage The lower front of case, and connected respectively with U-shaped aqueduct in the left and right sides;The installation plate bolt is mounted on a left side for water tank Side lower part.
Preferably, the device for fixing screen on headrest structure includes clips, fixed side panel, bolt and nut, protective pad and positioning Bolt, there are two the clips settings, and the clips are socketed in the outside of U-shaped conduit, the clips welding In the left upper portion of water tank;The fixed side panel is welded on the left and right sides of clips;The bolt and nut screw thread connects It connects in the two sides up and down of fixed side panel;The positioning bolt is threaded in the front side two up and down of clips.
Preferably, the adjustable auxiliary stand structure includes supporting sleeve, longitudinal holding pole, puller bolt, positioning sleeve Pipe, positioning pluging rod and support foot, the longitudinal holding pole are plugged on the lower inside of supporting sleeve;The puller bolt spiral shell Line is connected to the front side junction of supporting sleeve and longitudinal holding pole;The locating sleeve is welded on the middle and lower part of longitudinal holding pole; The positioning pluging rod is plugged on the lower inside of locating sleeve;The support foot is glued to the lower part of positioning pluging rod.
Preferably, the clips are socketed in the outside of U-shaped conduit.
Preferably, the supporting sleeve is welded on the lower part four corners of water tank.
Preferably, buffer spring and limit rope are additionally provided on the support foot, the buffer spring is socketed in The outside of locating sleeve and positioning pluging rod.
Preferably, the upper end screw of the limit rope is mounted at left and right sides of the lower part of longitudinal holding pole, the limit The lower end screw of rope is mounted at left and right sides of the top of support foot.
Preferably, the middle position of the U-shaped aqueduct is also threaded with regulating valve.
Preferably, the longitudinal baffle is longitudinally embedded in the bosom position of water tank.
Preferably, the protective pad is glued to the inside of clips, and the protective pad uses with a thickness of three millimeters extremely Five millimeters of rubber pads.
Preferably, the support foot that the bottom section of the support foot is set as semicircle, described uses rubber branch Foot.
Preferably, the left-side switch and left side water pump are electrically connected, and the right-side switch and right side water pump are electrical The water pump of model RGB15-10 is respectively adopted in connection, the left side water pump and right side wheel cylinder.
A kind of gas drainage tailrace and its application method specifically includes the following steps:
Step 1: U-tube both ends are sealed, and the valve on the left of U-tube are closed, while airtight stopper is plugged on U-tube Upper right;
Step 2: flooding aqueous on the right side of U-tube, fills the water to water tank right side, and aqueous is made to flood airtight stopper;
Step 3: when water column is not discharged aqueous in rising in U-tube, opening right-side switch makes city supply electricity to right side water pump confession Electricity, so that the aqueous on the right side of water tank to be drawn into the left side of water tank using U-shaped aqueduct.
Compared with prior art, the invention has the following beneficial effects:
1. in the present invention, the clips are socketed in the outside of U-shaped conduit, be conducive to that bolt and nut exists when in use It is tightened on fixed side panel, so that convenient install water tank.
2. in the present invention, the longitudinal baffle is longitudinally embedded in the bosom position of water tank, be conducive to using When the convenient aqueous to the left and right sides in water tank play compartmentation.
3. in the present invention, the supporting sleeve is welded on the lower part four corners of water tank, be conducive to facilitate when in use Play the role of Auxiliary support to the bottom of water tank.
4. in the present invention, the protective pad is glued to the inside of clips, the protective pad is used with a thickness of three millis Meter Zhi Wu millimeters of rubber pads, are conducive to can be avoided clips when in use and damage to U-shaped conduit.
5. in the present invention, buffer spring and limit rope, the buffer spring set are additionally provided on the support foot The outside in locating sleeve and positioning pluging rod is connect, is conducive to that the bottom to adjustable auxiliary stand structure is facilitated to play when in use Buffer function.
6. in the present invention, the upper end screw of the limit rope is mounted at left and right sides of the lower part of longitudinal holding pole, described The lower end screw of limit rope is mounted at left and right sides of the top of support foot, is conducive to facilitate when in use and be played to buffer spring Position-limiting action, so that buffer spring be avoided to eject positioning pluging rod in the inside of locating sleeve.
7. in the present invention, the support foot that the bottom section of the support foot is set as semicircle, described uses rubber Glue stabilizer blade is conducive to that the adjustable antiskid effect of auxiliary stand structure when being contacted with ground can be increased when in use.
8. in the present invention, the middle position of the U-shaped aqueduct is also threaded with regulating valve, be conducive to do not needing It can be avoided aqueous when water guide to flow out of U-shaped aqueduct.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of device for fixing screen on headrest structure of the invention.
Fig. 3 is the structural schematic diagram of aqueous storage device of the invention.
Fig. 4 is the structural schematic diagram of adjustable auxiliary stand structure of the invention.
Fig. 5 is the flow chart of gas drainage tailrace and its application method of the invention.
In figure:
1, gas drainage pipe;2, funnel tee tube;3, flange terminal pad;4, U-shaped conduit;5, airtight stopper;6, it is auxiliarily fixed Frame structure;61, clips;62, fixed side panel;63, bolt and nut;64, protective pad;65, positioning bolt;7, anti-skidding blind hole;8, Aqueous storage device;81, water tank;82, longitudinal baffle;83, U-shaped aqueduct;831, regulating valve;84, left side water pump;85, right Side water pump;9, valve;10, mounting plate;11, left-side switch;12, right-side switch;13, auxiliary stand structure is adjusted;131, it props up Support set pipe;132, longitudinal holding pole;133, puller bolt;134, locating sleeve;135, positioning pluging rod;136, support foot;1361, Buffer spring;1362, limit rope.
Specific embodiment
The present invention is described further below in conjunction with attached drawing:
In figure:
As shown in attached drawing 1 and attached drawing 3
The present invention provides a kind of gas drainage regenerating unit, including gas drainage pipe 1, funnel tee tube 2, flange terminal pad 3, U-shaped conduit 4, airtight stopper 5, device for fixing screen on headrest structure 6, anti-skidding blind hole 7, aqueous storage device 8, valve 9, mounting plate 10, a left side Side switch 11, right-side switch 12 and adjustable auxiliary stand structure 13, the funnel tee tube 2 pass through 3 spiral shell of flange terminal pad Bolt is mounted on the inside middle position of gas drainage pipe 1;The U-shaped conduit 4 is welded on the lower part of funnel tee tube 2;It is described Airtight stopper 5 be plugged on the upper right of U-shaped conduit 4;The device for fixing screen on headrest structure 6 is socketed on the outside of U-shaped conduit 4 Portion;The anti-skidding blind hole 7 is provided with the front left of U-shaped conduit 4;The aqueous storage device 8 is arranged in U-shaped conduit 4 Outer lower portion, and be mounted on the lower part of device for fixing screen on headrest structure 6;The valve 9 is threaded in the left side of U-shaped conduit 4 Top;Screw is mounted on the left side of mounting plate 10 to the left-side switch 11 and right-side switch 12 respectively;Described being adjusted is auxiliary Supporting structure 13 is helped to be mounted on the lower part of aqueous storage device 8;The aqueous storage device 8 includes water tank 81, it is longitudinal every Plate 82, U-shaped aqueduct 83, left side water pump 84 and right side water pump 85, the U-shaped aqueduct 83 are plugged on the front side of water tank 81 Lower part;The left side water pump 84 and 85 screw of right side water pump is mounted on the lower front of water tank 81, and in the left and right sides point It is not connected with U-shaped aqueduct 83;10 screw of mounting plate is mounted on the left lower of water tank 81;The longitudinal baffle 82 longitudinal bosom positions for being embedded in water tank 81, are conducive to facilitate the water to the left and right sides in water tank 81 when in use Liquid plays compartmentation, and the middle position of the U-shaped aqueduct 83 is also threaded with regulating valve 831, is conducive to be not required to It wants to can be avoided aqueous when water guide and be flowed out of U-shaped aqueduct 83.
As shown in Fig. 2, in above-described embodiment, specifically, the device for fixing screen on headrest structure 6 includes clips 61, Gu Determine side plate 62, bolt and nut 63, protective pad 64 and positioning bolt 65, there are two the settings of clips 61, the fixation Hoop 61 is socketed in the outside of U-shaped conduit 4, and the clips 61 are welded on the left upper portion of water tank 81;The affixed side Plate 62 is welded on the left and right sides of clips 61;The bolt and nut 63 is threaded in the two sides up and down of fixed side panel 62; The positioning bolt 65 is threaded in the front side two up and down of clips 61;The clips 61 are socketed in U-shaped conduit 4 Outside, be conducive to when in use tighten bolt and nut 63 on fixed side panel 62, water tank 81 pacified thus convenient Dress, the protective pad 64 are glued to the inside of clips 61, and the protective pad 64 is using with a thickness of three millimeters to five millimeters Rubber pad, is conducive to can be avoided clips 61 when in use and damages to U-shaped conduit 4.
As shown in Fig. 4, in above-described embodiment, specifically, the adjustable auxiliary stand structure 13 includes support sleeve Pipe 131, longitudinal holding pole 132, puller bolt 133, locating sleeve 134, positioning pluging rod 135 and support foot 136, the longitudinal direction Strut 132 is plugged on the lower inside of supporting sleeve 131;The puller bolt 133 is threaded in supporting sleeve 131 and indulges To the front side junction of strut 132;The locating sleeve 134 is welded on the middle and lower part of longitudinal holding pole 132;The positioning is inserted Bar 135 is plugged on the lower inside of locating sleeve 134;The support foot 136 is glued to the lower part of positioning pluging rod 135;Institute The supporting sleeve 131 stated is welded on the lower part four corners of water tank 81, is conducive to facilitate the bottom to water tank 81 when in use Play the role of Auxiliary support, buffer spring 1361 and limit rope 1362 are additionally provided on the support foot 136, described is slow The outside that spring 1361 is socketed in locating sleeve 134 and positioning pluging rod 135 is rushed, is conducive to facilitate when in use to adjustable auxiliary Buffer function is played in the bottom of supporting structure 13, and the upper end screw of the limit rope 1362 is mounted under longitudinal holding pole 132 At left and right sides of portion, the lower end screw of the limit rope 1362 is mounted at left and right sides of the top of support foot 136, is conducive to It is convenient when use that position-limiting action is played to buffer spring 1361, so that buffer spring 1361 be avoided to position positioning pluging rod 135 The inside of casing 134 ejects, and the bottom section of the support foot 136 is set as semicircle, and the support foot 136 is adopted With rubber feet, be conducive to that the adjustable anti-skidding effect of auxiliary stand structure 13 when being contacted with ground can be increased when in use Fruit.
A kind of gas drainage tailrace and its application method specifically includes the following steps:
Referring in particular to shown in Figure of description 5
S101: U-tube both ends are sealed, and the valve 9 in 4 left side of U-tube are closed, while airtight stopper 5 is plugged on U-tube 4 upper right;
S102: flooding aqueous on the right side of U-tube, to water tank 81 on the right side of fill the water, and aqueous is made to flood airtight stopper 5;
S103: when water column is not discharged aqueous in rising in U-tube, opening right-side switch 12 makes city supply electricity to right side water pump 85 Power supply, so that the aqueous on 81 right side of water tank to be drawn into the left side of water tank 81 using U-shaped aqueduct 83.
Working principle
When installing water tank 81, adjusting longitudinal holding pole 132 first is plugged on the length in supporting sleeve 131, and is adjusting Puller bolt 133 is tightened in longitudinal holding pole 132 and the junction of supporting sleeve 131 after section, cannot be guaranteed after tightening Positioning bolt 65 can be corresponding with anti-skidding blind hole 7, plays the role of Auxiliary support using buffer spring 1361 to facilitate, to make User can play buffer function when installing clips 61 on U-shaped aqueduct 83, and two panels clips 61 are socketed in U-shaped conduit On 4, then bolt and nut 63 is mounted on fixed side panel 62, while moving clips 61 up and down on U-shaped conduit 4, and make Positioning bolt 65 is corresponding with anti-skidding blind hole 7, and is screwed into anti-skidding blind hole 7, then tightens bolt and nut 63, opens valve Door 9 enters gas in U-shaped conduit 4, then closes valve 9, then water source is injected into the right side of water tank 81, and make Aqueous floods airtight stopper 5, to make the gas in U-shaped conduit 4 export out of airtight stopper 5, to generate in water tank 81 Water column opens regulating valve 831 and right-side switch 12 after water column all disappears, and powers to supply electricity to right side water pump 85 using city, And store the aqueous on 81 right side of water tank by the left side that U-shaped aqueduct 83 enters water tank 81, after extraction Regulating valve 831 is closed, regulating valve 831 and left-side switch 11 are opened when next time uses and utilizes left side water pump 84 by water storage The aqueous in 81 left side of case is drawn into the right side of water tank 81 by U-shaped aqueduct 83.
Using technical solutions according to the invention or those skilled in the art under the inspiration of technical solution of the present invention, Similar technical solution is designed, and reaches above-mentioned technical effect, is to fall into protection scope of the present invention.

Claims (10)

1. a kind of gas drainage tailrace, which is characterized in that the gas drainage tailrace, including gas drainage pipe (1), funnel three Siphunculus (2), flange terminal pad (3), U-shaped conduit (4), airtight stopper (5), device for fixing screen on headrest structure (6), anti-skidding blind hole (7), aqueous Storage device (8), valve (9), mounting plate (10), left-side switch (11), right-side switch (12) and adjustable auxiliary stand structure (13), the funnel tee tube (2) is mounted on the inside interposition of gas drainage pipe (1) by flange terminal pad (3) bolt It sets;The U-shaped conduit (4) is welded on the lower part of funnel tee tube (2);The airtight stopper (5) is plugged on U-shaped conduit (4) Upper right;The device for fixing screen on headrest structure (6) is socketed in the outer upper of U-shaped conduit (4);The anti-skidding blind hole (7) it is provided with the front left of U-shaped conduit (4);The aqueous storage device (8) is arranged under the outside of U-shaped conduit (4) Portion, and it is mounted on the lower part of device for fixing screen on headrest structure (6);The valve (9) is threaded on the left side of U-shaped conduit (4) Portion;Screw is mounted on the left sides of mounting plate (10) to the left-side switch (11) and right-side switch (12) respectively;Described is adjustable Section auxiliary stand structure (13) is mounted on the lower part of aqueous storage device (8);The aqueous storage device (8) includes water tank (81), longitudinal baffle (82), U-shaped aqueduct (83), left side water pump (84) and right side water pump (85), the U-shaped aqueduct (83) it is plugged on the lower front of water tank (81);The left side water pump (84) and right side water pump (85) screw is mounted on water storage The lower front of case (81), and connected respectively with U-shaped aqueduct (83) in the left and right sides;Mounting plate (10) the screw installation Left lower in water tank (81).
2. gas drainage tailrace as described in claim 1, which is characterized in that the device for fixing screen on headrest structure (6) includes Clips (61), fixed side panel (62), bolt and nut (63), protective pad (64) and positioning bolt (65), the clips (61) there are two setting, the clips (61) are socketed in the outside of U-shaped conduit (4), and the clips (61) are welded on The left upper portion of water tank (81);The fixed side panel (62) is welded on the left and right sides of clips (61);The bolt Nut (63) is threaded in the two sides up and down of fixed side panel (62);The positioning bolt (65) is threaded in clips (61) front side two up and down.
3. gas drainage tailrace as described in claim 1, which is characterized in that the adjustable auxiliary stand structure (13) Including supporting sleeve (131), longitudinal holding pole (132), puller bolt (133), locating sleeve (134), positioning pluging rod (135) and anti- Sliding stabilizer blade (136), the longitudinal holding pole (132) are plugged on the lower inside of supporting sleeve (131);The puller bolt (133) it is threaded in the front side junction of supporting sleeve (131) Yu longitudinal holding pole (132);Locating sleeve (134) weldering Connect the middle and lower part in longitudinal holding pole (132);The positioning pluging rod (135) is plugged on the lower inside of locating sleeve (134);Institute The support foot (136) stated is glued to the lower part of positioning pluging rod (135).
4. gas drainage tailrace as described in claim 1, which is characterized in that the clips (61) are socketed in U-shaped lead Manage the outside of (4).
5. gas drainage tailrace as described in claim 1, which is characterized in that the supporting sleeve (131) is welded on storage The lower part four corners of water tank (81).
6. gas drainage tailrace as described in claim 1, which is characterized in that also set up on the support foot (136) There are buffer spring (1361) and limit rope (1362), the buffer spring (1361) is socketed in locating sleeve (134) and positioning The outside of inserted link (135).
7. gas drainage tailrace as described in claim 1, which is characterized in that the upper end screw of the limit rope (1362) It is mounted at left and right sides of the lower part of longitudinal holding pole (132), the lower end screw of the limit rope (1362) is mounted on support foot (136) at left and right sides of top.
8. gas drainage tailrace as described in claim 1, which is characterized in that the interposition of the U-shaped aqueduct (83) It sets and is also threaded with regulating valve (831).
9. gas drainage tailrace as described in claim 1, which is characterized in that the longitudinal baffle (82) is longitudinally embedded in The bosom position of water tank (81).
10. a kind of application method of gas drainage tailrace, which is characterized in that the application method of the gas drainage tailrace includes Following steps:
Step 1: U-tube both ends are sealed, and the valve (9) on the left of U-tube (4) are closed, while airtight stopper (5) is plugged on U The upper right of type pipe (4);
Step 2: flooding aqueous on the right side of U-tube, fills the water to water tank (81) right side, and aqueous is made to flood airtight stopper (5);
Step 3: when water column is not discharged aqueous in rising in U-tube, opening right-side switch (12) makes city supply electricity to right side water pump (85) it powers, so that the aqueous on the right side of water tank (81) to be drawn into the left side of water tank (81) using U-shaped aqueduct (83).
CN201910850780.1A 2019-09-10 2019-09-10 Gas extraction water drainage device and using method thereof Active CN110500129B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910850780.1A CN110500129B (en) 2019-09-10 2019-09-10 Gas extraction water drainage device and using method thereof

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Application Number Priority Date Filing Date Title
CN201910850780.1A CN110500129B (en) 2019-09-10 2019-09-10 Gas extraction water drainage device and using method thereof

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CN110500129A true CN110500129A (en) 2019-11-26
CN110500129B CN110500129B (en) 2021-07-27

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202039898U (en) * 2011-04-30 2011-11-16 山西晋城无烟煤矿业集团有限责任公司 Device for automatically draining water in borehole in gas drainage
CN203146015U (en) * 2013-03-06 2013-08-21 中国矿业大学 Ascending drilling hole orifice drainage device
CN204327175U (en) * 2014-12-19 2015-05-13 重庆梅安森科技股份有限公司 Gas drainage pipeline drainage system
CN207813649U (en) * 2017-02-08 2018-09-04 平顶山天安煤业股份有限公司八矿 One kind being used for gas pumping automatic water drainage device
CN109276025A (en) * 2018-11-12 2019-01-29 山东职业学院 A kind of multi-functional adjustable desk
CN208816969U (en) * 2018-08-31 2019-05-03 昌邑市鑫宝水利建安工程有限公司 A kind of water pipeline for hydraulic engineering

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202039898U (en) * 2011-04-30 2011-11-16 山西晋城无烟煤矿业集团有限责任公司 Device for automatically draining water in borehole in gas drainage
CN203146015U (en) * 2013-03-06 2013-08-21 中国矿业大学 Ascending drilling hole orifice drainage device
CN204327175U (en) * 2014-12-19 2015-05-13 重庆梅安森科技股份有限公司 Gas drainage pipeline drainage system
CN207813649U (en) * 2017-02-08 2018-09-04 平顶山天安煤业股份有限公司八矿 One kind being used for gas pumping automatic water drainage device
CN208816969U (en) * 2018-08-31 2019-05-03 昌邑市鑫宝水利建安工程有限公司 A kind of water pipeline for hydraulic engineering
CN109276025A (en) * 2018-11-12 2019-01-29 山东职业学院 A kind of multi-functional adjustable desk

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